﻿using System;

using System.Web;

using System.Collections;

using System.Web.Services;

using System.Web.Services.Protocols;

//引入空间

using System.Data;

using System.Data.OleDb;

using System.Configuration;

/// <summary>

/// KeyFind 的摘要说明

/// </summary>

[WebService(Namespace = "http://tempuri.org/")]

[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

//添加服务脚本（必须添，否则程序不能正常运行）

[System.Web.Script.Services.ScriptService]

public class KeyFind : System.Web.Services.WebService

{

 

    public KeyFind()

    {

        //如果使用设计的组件，请取消注释以下行

        //InitializeComponent();

    }

    //定义数组保存获取的内容

    private string[] autoCompleteWordList = null;

    //两个参数“prefixText”表示用户输入的前缀，count表示返回的个数

    [WebMethod]

    public String[] GetCompleteDepart(string prefixText, int count)

    {

        ///检测参数是否为空

        if (string.IsNullOrEmpty(prefixText) == true || count <= 0) return null;

        // 如果数组为空

        if (autoCompleteWordList == null)

        {

            //读取数据库的内容
            DataSet ds = new DataSet();


            UDS.Components.HR H = new UDS.Components.HR();

            ds = H.GetStaff_NameList(prefixText);

            //读取内容文件的数据到临时数组

            string[] temp = new string[ds.Tables[0].Rows.Count];

            int i = 0;

            foreach (DataRow dr in ds.Tables[0].Rows)

            {

                temp[i] = dr["realname"].ToString();

                i++;

            }

            Array.Sort(temp, new CaseInsensitiveComparer());

            //将临时数组的内容赋给返回数组

            autoCompleteWordList = temp;

            //if (conn.State == ConnectionState.Open)

            //    conn.Close();

        }

        //定位二叉树搜索的起点

        int index = Array.BinarySearch(autoCompleteWordList, prefixText, new CaseInsensitiveComparer());

        if (index < 0)

        {   //修正起点

            index = ~index;

        }

        //搜索符合条件的数据

        int matchCount = 0;

        for (matchCount = 0; matchCount < count && matchCount + index < autoCompleteWordList.Length; matchCount++)

        {   ///查看开头字符串相同的项

            if (autoCompleteWordList[index + matchCount].StartsWith(prefixText, StringComparison.CurrentCultureIgnoreCase) == false)

            {

                break;

            }

        }

        //处理搜索结果

        string[] matchResultList = new string[matchCount];

        if (matchCount > 0)

        {   //复制搜索结果

            Array.Copy(autoCompleteWordList, index, matchResultList, 0, matchCount);

        }

        return matchResultList;

    }

}